The Niels Nielsen Fourteen-Side Barn Farm near Noonan, North Dakota, United States, is a round barn that was built in 1914 by successful Danish immigrant Niels Nielsen. It was built from a kit purchased from the Chicago House Wrecking Co. It was listed on the National Register of Historic Places in 1986.The barn "is an important representative of the round barn theme because it illustrates the popularity of pre-cut kits sometimes used in their construction."